I'm trying to replicate the same cursor effect (when we select the target area after clicking on the ability button) as in Nova's Hellfire shotgun ability, that means a cone that comes from the unit, and turn towards the target without moving from its original position.

I have duplicated the effect, replaced the TargetOn events by my own ability, and it works perfectly... until the unit stops moving.

When the unit is stationnary the cursor is here, but it's not moving towards my mouse anymore.

I managed to make it work by using triggers, so I guess I will stay that way, but If you can try to explain to me with more details on how to do it, what field to changes and how does everthing works, I'm sure that can be very helpful!

Maybe you could try to duplicate that ability tto target only air units. Or... In the ability's Effects, you could try changing everything related to Target Point to Target Unit. This is just my suggestion, so make sure to back up your file first if you're willing to test this.

I already try this. Well, not chaning ALL the Effects I must admit. I'll try with all the effects changed.

Yes the grapple missile is hugging the ground, and the beam behind it too.

Well it is starting from the the arm of the HERC so its not hugging the ground for the duration but it is moving towards the ground.